Opti-Lube XPD All-Season Diesel Fuel Additive Quarts - Treats 768 Gal

In this review the focus is on diesel owners who want a simple, year-round fuel treatment that improves lubrication and keeps injectors cleaner. The bottom line: Opti-Lube XPD All-Season Diesel Fuel Additive is best for truckers, fleet operators, and diesel hobbyists who need a maintenance product that increases lubricity and helps improve fuel economy while protecting injectors and pumps. The reviewer found it easy to use and effective at reducing deposits and improving engine smoothness when used as directed.

Key Features

• Increases lubricity: The formula boosts the lubricating properties of ultra-low-sulfur diesel so fuel system parts run with less wear.
• Improves fuel economy: Regular use has been reported to enhance mileage year round, delivering better fuel efficiency in both summer and winter.
• Cleans injectors: The additive helps remove and prevent deposits in injectors, improving spray pattern and combustion consistency.
• Protects against corrosion: It provides rust and corrosion prevention to help extend the life of fuel system components.
• Demulsifier and stabilizer: The product separates water from diesel and more than doubles storage life of standard diesel fuel for longer-term storage safety.
• Coverage per bottle: Each quart treats up to 128 gallons, and this pack treats 768 gallons total for extended service intervals.

Who It's For

This additive is aimed at diesel pickup and commercial truck owners who want a no-fuss maintenance treatment to protect injectors, pumps, and fuel system components. It is also a good fit for mechanics and fleet managers who need a product that improves lubricity and helps maintain fuel economy across many vehicles.

Those who need specialty cetane boosters for racing or highly tuned engines, or who require cold-flow only additives for extreme arctic conditions, may want a product tailored specifically for those needs instead of this all-season, multi-benefit formula.

Pros & Cons

Pros

• Improves lubricity and reduces wear on injectors and pumps, extending component life.
• Customers report smoother idle and better engine sound quality after use, indicating improved combustion.
• Acts as a demulsifier and stabilizer, helping separate water and extend fuel storage life.
• Comes in quarts sized to treat up to 128 gallons each, making dosing straightforward for large tanks.

Cons

• Not a dedicated extreme cold-weather anti-gel solution, so users in severe arctic climates should consider a cold-flow specific additive.
• Requires following bottle directions for best results, so inconsistent dosing limits effectiveness.

Specifications

Product type	All-season diesel fuel additive
Pack size	6 quarts (treats 768 gallons)
Coverage per quart	Treats up to 128 gallons
Main benefits	Lubricity, injector cleaning, corrosion protection, demulsifier
Cetane boost	Up to 3 points
Storage improvement	More than doubles standard diesel fuel storage life

Our Verdict

Opti-Lube XPD is a practical, multi-purpose diesel treatment that offers tangible lubricity improvements and injector cleaning for everyday diesel users. For truck owners and fleet operators seeking better fuel economy, smoother running engines, and added protection against corrosion and water contamination, this product represents good value when used as directed.

Frequently Asked Questions

How much fuel does one quart treat?
Each quart treats up to 128 gallons; the 6-quart pack treats up to 768 gallons total.

Will this prevent injector deposits?
Yes, the formula is designed to clean injectors and help prevent future build-up when used regularly.

Is it suitable for winter use?
It is an all-season additive and includes anti-gel properties, but those in extreme cold may prefer a dedicated cold-flow additive.